Unetbootin and grub are two bootloaders for installing ubuntu, the key of install ubuntu is to download IOS desktop

To install ubuntu on your computer, you can use USB and bootloaders.

Unetbootin and grub are two bootloaders.

Here are a list of bootloaders.


http://www.tecmint.com/best-linux-boot-loaders/

And the key to install ubuntu is to download IOS desktop first:

https://www.ubuntu.com/download/desktop

Hit the first "download" on the webpage. Save the IOS somewhere.



And here is a complete article on how to install ubuntu:

http://www.howtogeek.com/214571/how-to-dual-boot-linux-on-your-pc/

From there, we can learn, we need to disable secure boot before installing linux.